to understand this part you need to first read:https://www.deviantart.com/snowballflo/art/HeartverseAU-infodump2-832429707 the “Magical Bonds” & “Magic of Life” sections.
 
ok these kids are a result of “Heartmateship” as explained in the other post, which means the parents would be: “Closer than friends”, “Less than Lovers” and finally “They did not make these kids through sexual means”. when Cadance, Twilight and little Flurry Heart found out about the heartship bond and decided to teach Flurry to grow into a princess of that element, as to show their support of this method to other ponies who may feel scared of new elements being found in their world, Twilight, Sunset and other mentioned as the parents here, planned on having kids with their Heartmates, or with their significant others but with the heartship means to conceive a foal [couples are heartmates before they are lovers]. so anyways all the parents here decided to plan it, though some planned it at a later time. the three first ones were Twilight, Sunset and Starlight’s kids and the three of them had quite a journey experiencing the entire thing together lol. anyways just a reminder that the Heartship means of conceiving a child is that they exchange their “magic of life” with a unicorn/alicorn as a medium, and at most it would take a hug, nothing sexual.
 
also please take it easy with the comments, its just a cartoon and my idea of a fantasy would of magical horses.
 
also i have no fucking idea why the quality is so trash on DA what the fuck, ill post a clearer version on instagram i guess…